Hardy HI 1756-FC - Manual (Page 25)

NOTE You must calibrate the scale prior to rate calibration.
The PI controller calculates an output percentage based on the parameters P (proportional)
and I (integral). The rate calibration process can set the values for P and I automatically.
The output percent is determined by the formula:
P*((Setpoint - ActualRate)/MaxRate + I * (integral of the proportional term)).
P and I Must be > or = 0
Parameter A Rate Calibration Configuration PID I
The I parameter for Rate Calibration. See explanation under Parameter 9 above.
Parameter B Batch amount
The batch amount and preact parameters are used when operating in Batch mode. The
Batch Amount sets the amount of ingredient in weight units used per batch for the
selected ingredient.
Range: > 0.0 (default 0.0) It is not necessary to enter 0.00 for these parameters) The
decimal point is positioned based on the Weight Decimal parameter for batch amount.
Parameter C Preact
Preact is used when operating in Batch mode. It is the amount to allow between the batch
amount signal and the time when the feeder actually stops feeding. Where the feeder
slows to a stop, set the preact value so the desired batch amount is dispensed when the
feeder stops completely. The decimal point is positioned based on the Weight Decimal
parameter for preact. No limits.
Range: >0.0 (default 0.0) No limits.
Parameter D Mode
You can operate either in continuous or batch mode depending on the process.
Range: 0=continuous or 1=batch.
Parameter E Prime Time
The time in seconds it takes to get the system up to full flow for the first calibration point.
on the first test OP% run of the rate calibration, the feeder must prime the feeding system
and the feeding system must smoothly feed product at an OP % selected rate.
Range: 1-999 (default 5 sec) Must be > or = 0
Parameter F Pause Time
This is the time you want the feeder to wait between Auto Rate Calibration cycles. If
necessary, more material may be added to the feeder. Note that this parameter should be
set long enough to allow the operator to trigger a "hold" in between feed runs.
We recommend that you make the Pause Time equal to or greater than the Timebase
value you entered for the ROC.
NOTE If a feeder is manually paused before a cycle starts or during a cycle, when the test is
restarted it will run from the beginning.
Parameter 10 Feed Time
Feed Time is the test duration at each rate. Set this to a minimum of 10 X ROC time base.
Make sure that your feeder hopper holds enough product to complete the high percentage
rate test. You cannot pause or refill during a test phase.
Must be > 0. Range: 1-999
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Chapter 4 ●
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